How did hails selassie contribute to world war 2

Haile Selassie personally directed campaigns against the Italian troops in northern Abyssinia, but the better equipped Italian troops, coupled with the willingness to deploy chemical weapons, frustrated the Abyssinian Emperor.

the correct answer is:   the domino theory states that if one country in a region came under the influence of communism, then the surrounding countries would follow in a domino effect.

you didn't list the options. however, a few communist countries today are: the people's republic of china, north korea, and cuba.